PN072132P902 3D658187G901 Schneider A Brake Unit Trigger Board Designed For Altivar ATV61 And ATV71 Frequency Converters Engineered specifically for heavy-duty industrial VFDs, the Schneider Electric PN072132P902 (3D658187G901) brake unit trigger board delivers high-precision gate pulse control for dynamic braking systems. It directly addresses the critical issue of overvoltage faults (F010 or similar ObF codes) during rapid motor deceleration in high-inertia applications.